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Reduction of Lasing Threshold by Deforming a Circular Resonator |
| PU Xiao-Yun;XIA Yun-Jie;LEE Wing-Kee |
| Department of Physics, Yunnan University, Kunming 650091Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong |
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| Cite this article: |
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PU Xiao-Yun, XIA Yun-Jie, LEE Wing-Kee 2002 Chin. Phys. Lett. 19 500-503 |
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Abstract We have reduced the lasing threshold of a circular resonator formed by a dye-doped pendant drop, by changing its shape from a circle to an oval. This phenomenon can be explained by the decrease of the number (p) of modes that support lasing in the resonator. A theory that connects wave and ray pictures in dealing with the cavity resonance is used to estimate p and its dependence on the eccentricity of an oval-shaped resonator. The measured lasing threshold and the calculated p have a linear relationship in agreement with our prediction.
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| Keywords:
42.60.Da
42.55.Sa
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Published: 01 April 2002
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| PACS: |
42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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42.55.Sa
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(Microcavity and microdisk lasers)
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